Pressure equalization valve
AssigneeKnorr-Bremse Systeme FüR Schienenfahrzeuge GmbH
InventorsMark Hemmings, Nigel Anstey, Justin Peare
Life of this patent
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Abstract
A pressure equalization valve arrangement for a rail brake system includes a hold valve and a membrane vent valve each having a control chamber. The hold valve and vent valve are piloted by a respective solenoid valve. A further solenoid valve is connected to the control chamber of the vent valve to allow the pressure across the vent valve membrane to be equalized with the brake cylinder pressure to decrease the pressure difference across the membrane. This results in an improved vent time.
Claims16
A brake valve arrangement for a rail brake system configured to control air flow to brake cylinders, the arrangement comprising:
- a hold membrane valve;
- and
- a vent membrane valve, wherein the hold membrane valve and the vent membrane valve each have a control chamber, wherein the hold membrane valve and vent membrane valve are piloted by respective solenoid valves;
- and
- a further solenoid valve connected to the control chamber of the vent membrane valve to enable equalization of a pressure across the vent valve membrane with a brake cylinder pressure to decrease a pressure difference across the vent valve membrane.
Dependencies are inferred from the claim text.